"Traction" archetype also has an enterprise version: One or few highly successful enterprise deployments. E.g. you've solved a certain high value problem for a particular corporation and raising money to solve it for all companies.

Cloudera is a typical example. It went from Hadoop platform in Yahoo to Hadoop solutions for everyone.

Other companies who could have used this pitch: Bloom Energy, Yammer, PBWorks, GitHub, Box.net